Method executed by first or second network equipment, user equipment and corresponding equipment

Abstract

The present disclosure provides a method executed by a first network device, the method comprising: receiving a first container from a second network device, the first container comprising a radio link failure (RLF) report received by the second network device from a user equipment (UE), the RLF report comprising a time window related message; and adjusting the setting of the time window based on the time window related message in the RLF report.

Description

Technical Field

[0001] The present disclosure relates to the field of communications, and more specifically, to a method executed by a first network device, a method executed by a second network device, a method executed by a user equipment, a first network device, a second network device, and a user equipment. Background Art

[0002] In order to meet the increased demand for wireless data communication services since the deployment of 4G communication systems, efforts have been made to develop improved 5G or quasi-5G communication systems. Therefore, 5G or quasi-5G communication systems are also referred to as "super 4G networks" or "post-LTE systems."

[0003] Wireless communication is one of the most successful innovations in modern history. The number of subscribers to wireless communication services recently exceeded 5 billion and continues to grow rapidly. The demand for wireless data services is growing rapidly due to the increasing popularity of smartphones and other mobile data devices (e.g., tablets, laptops, netbooks, e-book readers, and machine-type devices) among consumers and enterprises. In order to meet the high growth of mobile data services and support new applications and deployments, it is critical to improve the efficiency and coverage of the wireless interface. Summary of the invention

[0004] According to one aspect of the present disclosure, a method performed by a first network device is provided, the method comprising: receiving a first container from a second network device, wherein the first container includes a radio link failure RLF report received by the second network device from a user equipment UE, the RLF report including a time window related message; and adjusting a setting of a time window based on the time window related message in the RLF report.

[0005] According to the method provided by the present disclosure and executed by the first network device, the time window related message includes at least one of the following: first time indication information, used to indicate the time from the start time of the time window to the time when RLF is detected; second time indication information, used to indicate the time from the end time of the time window to the time when RLF is detected; third time indication information, used to indicate the time from the time when RLF is detected to the start time of the time window; fourth time indication information, used to indicate the time from the time when RLF is detected to the end time of the time window; fifth indication information, used to indicate whether the time window ends when RLF occurs; sixth indication information, used to indicate whether the time window starts when RLF occurs; seventh indication information, used to indicate that the time window ends too early or starts too early; eighth indication information, used to indicate that the time window starts too late or ends too late.

[0006] According to the method performed by the first network device provided by the present disclosure, the receiving the first container from the second network device includes: receiving the first container from the second network device via a core network node.

[0007] According to the method performed by the first network device provided by the present disclosure, the method further comprises: sending a radio resource control RRC reconfiguration message to the user equipment, wherein the RRC reconfiguration message includes the configuration of the time window and the conditional event.

[0008] According to one aspect of the present disclosure, a method performed by a user equipment is provided, the method comprising: generating a radio link failure RLF report, the RLF report comprising a time window related message; and sending a first message to a second network device, the first message comprising the RLF report.

[0009] According to the method performed by the user equipment provided by the present disclosure, the generating of the radio link failure RLF report includes: determining the time window start time to the time when the RLF is detected; or determining the time window end time to the time when the RLF is detected; or determining the time when the RLF is detected to the time window start time; or determining the time when the RLF is detected to the time window end time; or judging whether the time window ends when the RLF occurs; or / and judging whether the time window starts when the RLF occurs; or / and judging whether the time window is too early; or / and judging whether the time window is too late; the UE saves the determination or judgment result in the RLF report.

[0010] According to the method performed by the user equipment provided by the present disclosure, the time window related message includes at least one of the following: first time indication information, used to indicate the time from the start time of the time window to the time when RLF is detected; second time indication information, used to indicate the time from the end time of the time window to the time when RLF is detected; third time indication information, used to indicate the time from the time when RLF is detected to the start time of the time window; fourth time indication information, used to indicate the time from the time when RLF is detected to the end time of the time window; fifth indication information, used to indicate whether the time window ends when RLF occurs; sixth indication information, used to indicate whether the time window starts when RLF occurs; seventh indication information, used to indicate that the time window ends too early or starts too early; eighth indication information, used to indicate that the time window starts too late or ends too late.

[0011] According to one aspect of the present disclosure, a method performed by a user equipment is provided, the method comprising: receiving a radio resource control (RRC) reconfiguration message from a first network device, the RRC reconfiguration message comprising a configuration and a conditional event regarding a time window; determining whether the configuration of the time window is reasonable; and sending a radio resource control (RRC) reconfiguration completion message or an RRC establishment message to a candidate cell based on the configuration of the time window.

[0012] According to the method performed by the user equipment provided in the present disclosure, the sending of a radio resource control RRC reconfiguration completion message or an RRC establishment message to the candidate cell based on the configuration of the time window includes: based on the configuration of the time window and conditional events, when it is determined that the time window is too late; sending a radio resource control RRC reconfiguration completion message to the candidate cell, wherein the RRC reconfiguration completion message includes an identifier of the UE in the source cell.

[0013] According to the method performed by the user equipment provided in the present disclosure, the sending of the radio resource control RRC reconfiguration completion message or the RRC establishment message to the candidate cell based on the configuration of the time window includes: based on the configuration of the time window and conditional events, when it is determined that the time window is too early or too late; sending the RRC establishment message to the candidate cell.

[0014] According to one aspect of the present disclosure, a method performed by a second network device is provided, the method comprising: receiving a first message sent by a user equipment UE, the first message comprising the RLF report, the RLF report comprising a time window related message; and sending the RLF report to the first network device.

[0015] According to the method provided by the present disclosure and executed by the second network device, the time window related message includes at least one of the following: first time indication information, used to indicate the time from the start time of the time window to the time when the RLF is detected; second time indication information, used to indicate the time from the end time of the time window to the time when the RLF is detected; third time indication information, used to indicate the time from the time when the RLF is detected to the start time of the time window; fourth time indication information, used to indicate the time from the time when the RLF is detected to the end time of the time window; fifth indication information, used to indicate whether the time window ends when the RLF occurs; sixth indication information, used to indicate whether the time window starts when the RLF occurs; seventh indication information, used to indicate that the time window ends too early or starts too early; eighth indication information, used to indicate that the time window starts too late or ends too late.

[0016] According to the method performed by the second network device provided in the present disclosure, the method further includes: sending a second message to the user equipment, wherein the second message includes information for requesting an RLF report.

[0017] According to another aspect of the present disclosure, a first network device is provided, comprising: a transceiver configured to send and receive signals to and from the outside; and a controller configured to control the transceiver to execute the method executed by the first network device.

[0018] According to another aspect of the present disclosure, a second network device is provided, comprising: a transceiver configured to send and receive signals to and from the outside; and a controller configured to control the transceiver to execute the method executed by the second network device.

[0019] According to another aspect of the present disclosure, a user equipment is provided, the user equipment comprising: a transceiver configured to send and receive signals to and from the outside; and a controller configured to control the transceiver to execute the above method executed by the user equipment.

[0020] According to another aspect of the present disclosure, a non-transitory computer-readable recording medium is provided, on which a program for executing any of the above methods when executed by a computer is stored. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is an exemplary system architecture for System Architecture Evolution (SAE).

[0022] Figure 2 is an exemplary system architecture according to various embodiments of the present disclosure.

[0023] Figure 3 is a diagram of a method for supporting self-configuration and self-optimization according to an embodiment of the present disclosure.

[0024] Figure 4 is a flowchart of a method executed by a user equipment according to an embodiment of the present disclosure.

[0025] Figure 5 is a block diagram of a network node according to an embodiment of the present disclosure.

[0026] Figure 6 is a block diagram of a user equipment according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the embodiments of the present disclosure clearer, the technical solution of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0028] Before carrying out the description of the following specific embodiments, it may be advantageous to elaborate on the definitions of certain words and phrases used throughout this patent document.The term "coupling" and its derivatives refer to any direct or indirect communication between two or more elements, regardless of whether these elements are in physical contact with each other.The terms "send", "receive" and "communication" and their derivatives cover direct and indirect communication.The terms "include" and "comprise" and their derivatives mean including but not limited to.The term "or" is inclusive, meaning and / or.The phrase "associated with..." and its derivatives mean including, included in, connected to, interconnected with, included in, connected to or connected with, coupled to or coupled with, can communicate with, collaborate with, interweave, juxtapose, approach, bind to or bind with, have, have... attributes, have... relationships or have relationships with, etc.The term "controller" means any device, system or part thereof that controls at least one operation.Such a controller can be implemented in hardware, or implemented in a combination of hardware and software and / or firmware.The functions associated with any particular controller can be centralized or distributed locally or remotely. The phrase "at least one of" when used with a list of items means that different combinations of one or more of the listed items may be used, and only one item in the list may be needed. For example, "at least one of A, B, and C" includes any of the following combinations: A, B, C, A and B, A and C, B and C, and A and B and C. For example, "at least one of A, B, or C" includes any of the following combinations: A, B, C, A and B, A and C, B and C, and A and B and C.

[0029] In addition, the various functions described below can be implemented or supported by one or more computer programs, each of which is formed by a computer-readable program code and embodied in a computer-readable medium. The terms "application" and "program" refer to one or more computer programs, software components, instruction sets, processes, functions, objects, classes, instances, related data or parts thereof suitable for implementation in a suitable computer-readable program code. The phrase "computer-readable program code" includes any type of computer code, including source code, object code and executable code. The phrase "computer-readable medium" includes any type of medium that can be accessed by a computer, such as a read-only memory (ROM), a random access memory (RAM), a hard drive, a compact disc (CD), a digital video disc (DVD) or any other type of memory. "Non-transitory" computer-readable media excludes wired, wireless, optical or other communication links that transmit temporary electrical signals or other signals. Non-transitory computer-readable media include media that can permanently store data and media that can store and rewrite data later, such as rewritable optical discs or erasable memory devices.

[0030] The terms used to describe the embodiments of the present application are not intended to limit and / or define the scope of the present application. For example, unless otherwise defined, the technical terms or scientific terms used in the present disclosure should be the common meanings understood by people with ordinary skills in the field to which the present application belongs.

[0031] It should be understood that the words "first", "second" and the like used in the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. Unless the context clearly indicates otherwise, the singular forms "a", "an" or "the" and the like do not indicate quantity limitation, but indicate the presence of at least one.

[0032] As used herein, any reference to "one example" or "example", "one embodiment" or "embodiment" means that a particular element, feature, structure, or characteristic described in conjunction with the embodiment is included in at least one embodiment. The phrases "in one embodiment" or "in an example" appearing in different places in the specification do not necessarily all refer to the same embodiment.

[0033] As used herein, "a portion" of something means "at least some" of that thing, and thus may mean less than all of that thing or all of that thing. Thus, "a portion" of a thing includes the entire thing as a special case, i.e., the entire thing is an example of a portion of a thing.

[0034] It will be further understood that the terms "include" or "comprises" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connected" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right", etc. are only used to indicate relative position relationships. When the absolute position of the object being described changes, the relative position relationship may also change accordingly.

[0035] The various embodiments discussed below for describing the principles of the present disclosure in this patent document are intended to be illustrative only and should not be interpreted in any way as limiting the scope of the present disclosure. Those skilled in the art will appreciate that the principles of the present disclosure can be implemented in any appropriately arranged wireless communication system. For example, although the following detailed description of the embodiments of the present disclosure will be directed to LTE and 5G communication systems, those skilled in the art will appreciate that the main points of the present disclosure can also be applied to other communication systems with similar technical backgrounds and channel formats with slight modifications without substantially departing from the scope of the present disclosure. The technical solutions of the embodiments of the present application can be applied to various communication systems, for example, the communication system may include a global system for mobile communications (GSM) system, a code division multiple access (CDMA) system, a wideband code division multiple access (WCDMA) system, a general packet radio service (GPRS), a long term evolution (LTE) system, a LTE frequency division duplex (FDD) system, a LTE time division duplex (TDD), a universal mobile telecommunication system (UMTS), a world-wide interoperability for microwave access (WiMAX) communication system, a fifth generation (5G) system or a new radio (NR), etc. In addition, the technical solutions of the embodiments of the present application can be applied to future-oriented communication technologies. In addition, the technical solutions of the embodiments of the present application can be applied to future-oriented communication technologies.

[0036] The following description with reference to the accompanying drawings is provided to facilitate a comprehensive understanding of the various embodiments of the present disclosure as defined by the claims and their equivalents. This description includes various specific details to facilitate understanding but should be considered as exemplary only. Therefore, one of ordinary skill in the art will recognize that various changes and modifications can be made to the various embodiments described herein without departing from the scope and spirit of the present disclosure. In addition, for the sake of clarity and conciseness, descriptions of well-known functions and structures may be omitted.

[0037] The terms and expressions used in the following specification and claims are not limited to their dictionary meanings, but are merely used by the inventor to enable a clear and consistent understanding of the present disclosure. Therefore, it should be apparent to those skilled in the art that the following description of various embodiments of the present disclosure is provided for illustration purposes only and not for the purpose of limiting the present disclosure as defined in the appended claims and their equivalents.

[0038] It should be understood that the singular forms "a," "an," and "the" include plural referents unless the context clearly dictates otherwise. Thus, for example, reference to "a component surface" includes reference to one or more of such surfaces.

[0039] The term "include" or "may include" refers to the presence of the corresponding disclosed functions, operations or components that can be used in various embodiments of the present disclosure, rather than limiting the presence of one or more additional functions, operations or features. In addition, the term "include" or "have" may be interpreted as indicating certain characteristics, numbers, steps, operations, constituent elements, components or combinations thereof, but should not be interpreted as excluding the possibility of the presence of one or more other characteristics, numbers, steps, operations, constituent elements, components or combinations thereof.

[0040] The term "or" used in various embodiments of the present disclosure includes any of the listed terms and all combinations thereof. For example, "A or B" may include A, may include B, or may include both A and B.

[0041] Unless defined differently, all terms (including technical terms or scientific terms) used in the present disclosure have the same meanings as understood by those skilled in the art described in the present disclosure. Common terms as defined in dictionaries are interpreted as having meanings consistent with the context in the relevant technical field, and should not be interpreted ideally or overly formally unless clearly defined in the present disclosure.

[0042] The following discussion Figures 1 to 6 The various embodiments used to describe the principles of the present disclosure in this patent document are for illustration only and should not be interpreted in any way as limiting the scope of the present disclosure. Those skilled in the art will appreciate that the principles of the present disclosure can be implemented in any appropriately arranged system or device.

[0043] Figure 1 It is an exemplary system architecture 100 of System Architecture Evolution (SAE). User Equipment (UE) 101 is a terminal device used to receive data. Evolved Universal Terrestrial Radio Access Network (E-UTRAN) 102 is a radio access network, which includes a macro base station (eNodeB / NodeB) that provides a wireless network interface for the UE to access. The Mobility Management Entity (MME) 103 is responsible for managing the mobility context, session context and security information of the UE. The Serving Gateway (SGW) 104 mainly provides user plane functions, and the MME 103 and SGW 104 may be in the same physical entity. The Packet Data Network Gateway (PGW) 105 is responsible for functions such as billing and lawful interception, and may also be in the same physical entity as the SGW 104. The Policy and Charging Rules Function Entity (PCRF) 106 provides Quality of Service (QoS) policies and charging criteria. The General Packet Radio Service Support Node (SGSN) 108 is a network node device that provides routing for data transmission in the Universal Mobile Telecommunications System (UMTS). The Home Subscriber Server (HSS) 109 is the home subsystem of the UE and is responsible for protecting user information including the current location of the user equipment, the address of the service node, user security information, and the packet data context of the user equipment.

[0044] Figure 2 2 is an exemplary system architecture 200 according to various embodiments of the present disclosure. Other embodiments of the system architecture 200 can be used without departing from the scope of the present disclosure.

[0045] User equipment (UE) 201 is a terminal device used to receive data. The next generation radio access network (NG-RAN) 202 is a radio access network, which includes a base station (gNB or eNB connected to the 5G core network 5GC, the eNB connected to the 5GC is also called ng-gNB) that provides the UE with an access wireless network interface. The access control and mobility management function entity (AMF) 203 is responsible for managing the mobility context and security information of the UE. The user plane function entity (UPF) 204 mainly provides user plane functions. The session management function entity SMF 205 is responsible for session management. The data network (DN) 206 includes services such as operators, Internet access, and third-party services.

[0046] Exemplary embodiments of the present disclosure are further described below in conjunction with the accompanying drawings.

[0047] The text and drawings are provided as examples only to help understand the present disclosure. They should not be interpreted as limiting the scope of the present disclosure in any way. Although certain embodiments and examples have been provided, it will be apparent to those skilled in the art based on what is disclosed herein that the embodiments and examples shown may be changed without departing from the scope of the present disclosure.

[0048] When a large number of UEs need to switch at the same time, a large number of UEs switching at the same time will have an impact on the network and air interface, resulting in UE radio link failure or unsuccessful switching. In order to improve the efficiency of switching and reduce the burden on the network and air interface, 3GPP version 17 defines time window-based switching. The network can configure a time window for the UE, within which the UE switches. By configuring different time windows for different UEs, the purpose of dispersing the UE switching process is achieved.

[0049] For handover based on time window, during the handover preparation process, the source base station sends a handover request message to the target base station, and the handover request message carries a conditional handover information request information element. Among them, the conditional handover information request information element contains the indication information of the start of the conditional handover, contains the possibility of the expected handover, and also contains the time window information. The time window contains the handover window start time and the window duration. The target base station infers that the UE is switched to the target base station within the time window according to the time window information, and the target base station can reserve resources according to the time window information. The target base station sends configuration information to the source base station, and the message contains the identifier of the target cell and the RRC (Radio Resource Control) message to be sent to the UE. The source base station forwards the RRC message to the UE, and the RRC message contains the identifier of the conditional handover, the related measurement configuration of the conditional handover, and the information of the wireless resource connection reconfiguration. If the related measurement of the conditional handover contains the identifier of the target cell to be measured, it contains the conditional initiation configuration, and the conditional initiation configuration contains the time window and the event of the conditional handover, for example, the conditional handover is the conditional event A3. If the measurement configuration of the conditional switching is based on the time condition, the UE determines whether the time window start condition is met. If so, it is also necessary to determine whether the event of the conditional switching is met. If all are met, the UE can switch to the target cell. When the time window of the conditional switching is set unreasonably, the quality of the UE serving cell has caused the radio link failure before the time window starts, so the switching process fails.

[0050] As described above, if the time window is set unreasonably, it may also cause the UE's radio link failure or handover failure. The handover based on the time window currently needs to be further enhanced to improve the system performance. However, it is understandable that the technical problems that can be solved by the present disclosure are not limited to this, and the above technical problems are only provided as examples. Any technical problems that can be solved by the embodiments of the present disclosure belong to the scope of protection of the present disclosure.

[0051] An embodiment of the present disclosure provides a method performed by a first network device (e.g., a source base station), and the method may include: receiving a first container from a second network device, wherein the first container includes a radio link failure RLF report received by the second network device from a user equipment UE, and the RLF report includes a time window related message; and adjusting the setting of the time window based on the time window related message in the RLF report.

[0052] Through the above method, self-configuration and self-optimization of the time window are achieved, reducing the occurrence of failures.

[0053] It should be noted that the start time of the time window in the present invention can be calculated in units of 10 milliseconds since 00:00:00 on January 1, 1900 (midnight between Sunday, December 31, 1899 and Monday, January 1, 1900) in UTC seconds, and the duration of the time window can be milliseconds or multiples of milliseconds. Other expressions are also possible, and the present invention does not limit this.

[0054] The NR (New Radio) and LTE (Long Term Evolution) in the following description are only examples of different RATs (Radio Access Technology), and other RATs may also be used, and the present invention is not limited thereto. Moreover, it can be understood that the present invention may also be extended to other communication systems, such as 6G communication systems, etc.

[0055] See also Figure 3 , Figure 3 is a diagram of a method for supporting self-configuration and self-optimization according to an embodiment of the present disclosure.

[0056] like Figure 3 As shown, the source cell is configured with conditional switching, and the UE has not switched to the candidate cell. It is detected in the source cell, or RLF occurs. The UE saves some information in the RLF report, and then the UE accesses another base station, such as base station 2. Base station 2 obtains the RLF report of the UE, and base station 2 sends the RLF report to the source base station. The source base station analyzes whether the conditional switching is appropriate. The method includes the steps of:

[0057] Step 301, the source base station requests CHO (Conditional Handover) of one or more candidate cells. If there are multiple candidate cells, the multiple candidate cells may belong to one or more candidate base stations. The source base station sends a handover request message to the candidate base station. The handover request cell corresponds to each candidate cell. The handover request message includes an identifier assigned by the source base station to the UE, a unique identifier of the candidate cell or the destination cell, the encryption capability of the UE, the PDU session information to be established, the context information of the RRC, and the information of the conditional handover request, the information of the conditional handover request includes a time window, and the time window includes a start time and a window duration.

[0058] The candidate base station or candidate cell reserves resources based on the time window information. If the time window times out and the UE has not appeared in the target candidate cell, the candidate cell may consider that the UE has selected another candidate cell or that the conditional handover has been cancelled, thereby releasing the reserved resources. In implementation, the candidate cell may retain the pre-allocated resources for a period of time after the time window times out.

[0059] Step 302: The source base station receives a handover request confirmation message from a candidate base station. The handover request confirmation message is for each candidate cell.

[0060] The message includes a transparent container from the destination base station to the source base station. For conditional handover, the container includes the RRC reconfiguration information configured by the candidate cell for the UE.

[0061] Step 303: The source base station sends an RRC reconfiguration message to the UE.

[0062] The message includes conditional reconfiguration information, including a conditional reconfiguration addition and modification list, which includes a conditional reconfiguration identifier, an identifier of a candidate cell, a configuration of CHO execution conditions (also a configuration of measurement and reporting), and RRC reconfiguration information corresponding to the execution conditions. After receiving the message, the UE may send an RRC reconfiguration completion message to the source base station in step 304, indicating that the RRC reconfiguration message has been received.

[0063] The configuration of CHO execution conditions is also called conditional trigger configuration or conditional switching configuration. The UE measures the candidate cell to determine whether the cell meets the CHO execution conditions. When the cell meets the execution conditions, the UE will select the candidate cell as the destination cell and the new serving cell. The UE synchronizes with the new serving cell and sends an RRC reconfiguration completion message to the new cell, thus completing the conditional switching.

[0064] For time-based conditional switching, the CHO execution condition includes the setting of the time window and the setting of the conditional event. The time window includes the start time and the window duration. The start time, also known as the T1 time, indicates the moment when the UE can start selecting a new service cell. The start time plus the window duration, also known as the T2 time, indicates that the UE must establish a connection with the new service cell before this moment. The candidate cell pre-allocates resources according to the time window. After the time window times out, if the RRC reconfiguration completion sent by the UE is not received, the candidate cell can consider that the UE has selected another cell, thereby releasing the pre-allocated resources. In addition to the time window, the CHO execution condition also includes a conditional event to constrain the signal quality of the candidate cell and / or the service cell. For example, the conditional event is set to conditional event A3. Conditional event A3 refers to the signal quality of the neighboring cell. If the signal quality of the current service cell is higher than a threshold value, the CHO conditional event is triggered, and the UE can select the neighboring cell as the new service cell. For time-based conditional switching, the UE determines whether the conditional event is met within the time described in the time window. If a candidate cell satisfies the conditional event within the time window, it is considered that the conditional switching is met and the conditional switching can be executed. The UE can leave the source cell / source base station. According to the RRC-related configuration information corresponding to the candidate cell, the UE initiates a synchronization process to the candidate cell. After synchronization, it sends an RRC reconfiguration completion message to the candidate cell, selects the destination cell as the new service cell, and completes the conditional switching.

[0065] The time window is related to the candidate cell resource allocation and the time for the UE to select the candidate cell, so it greatly affects whether the conditional handover can be successful. When the time window setting in the execution condition is unreasonable, the following situations may occur:

[0066] The time window starts too late. Before the time window starts, the quality of the UE's serving cell has deteriorated, and the quality of the neighboring cell is good enough, which means that the conditional event has been met. If the UE must be within the time window and the quality of the candidate cell meets the conditional event before it can select the candidate cell and initiate synchronization and RRC reconfiguration completion messages to the candidate cell, the time window starts too late, which will cause the UE to experience a radio link failure in the source cell. If the UE can send synchronization and RRC reconfiguration completion messages to the candidate cell whose quality meets the conditional event based on the conditional event only, one problem is that the candidate cell reserves resources based on the time window. If the time window is set too late, the candidate cell receives the RRC reconfiguration completion message before the time window starts, and the candidate cell cannot correctly parse the RRC reconfiguration completion message.

[0067] The time window starts too early, or the time window duration is set too short, that is, during the time window, the quality of the neighboring cell has not reached a sufficiently good level, the conditional event is not met, and the conditional switching cannot be performed; when the quality of the neighboring cell meets the conditional switching, the time window has timed out and ended. If the UE must be within the time window and the quality of the candidate cell meets the conditional event before selecting the candidate cell, as the quality of the source cell deteriorates, the UE will experience a radio link failure in the source cell. If the UE can send synchronization and RRC reconfiguration completion messages to the candidate cell whose quality meets the conditional event based only on the conditional event, another problem is that if the time window is too early, when the RRC reconfiguration completion message is received, the candidate cell has already released the pre-allocated resources and the UE's context information, so the RRC reconfiguration completion cannot be received normally.

[0068] If a radio connection failure (RLF) occurs in the cell of the source base station, in the following description, radio connection failure (RLF) may also refer to a handover failure, and information related to RLF failure may also include handover failure information. The UE saves the radio connection failure information or handover failure information in the RLF report variable. After the UE has an RLF, based on the measurement results, the UE may select another cell with good signal quality and re-establish an RRC connection with the cell. The UE sends an RRC establishment request process to the cell. During the RRC establishment process, the UE notifies the network that the UE has saved the RLF report, and the network can decide whether to obtain the RLF report from the UE. During this process, the UE records one or more of the following information and includes one or more of the information in the RLF report:

[0069] - The identity of the cell where the RLF occurs. The cell identity may be a cell unique identity CGI, or a cell physical layer identity PCI, or other identities.

[0070] -Measurement results, which include the measurement results of the serving cell, source cell, destination cell, and neighboring cell. The measurement results include the cell identifier and the measured value of the air interface quality of the cell. The cell identifier can be the cell unique identifier CGI, or the cell physical layer identifier PCI, or other identifiers. The measured value can be the RSRP (Reference Signal Receiving Power) and RSRQ (Reference Signal Receiving Quality) of the cell.

[0071] - Identification of the re-established cell. After RLF occurs, the UE can reselect a cell and initiate RRC connection establishment in the re-selected cell. The re-selected cell is the re-established cell. The cell identifier can be the cell unique identifier CGI, or the cell physical layer identifier PCI, or other identifiers.

[0072] -T1: The time from RLF time to RRC establishment completion (timeUntilReconnection-r16).

[0073] The UE performs a cell reselection and establishes an RRC connection in the reselected cell. The UE saves the time from the occurrence of RLF to the sending of RRC establishment completion in the RLF report.

[0074] -T2: The time from HO (handover) execution to detection of RLF (timeConnFailure)

[0075] -T3: The time from the last DAPS handover to the source cell detecting RLF,

[0076] (timeConnSourceDAPS-Failure)(T304 Run). Value is in milliseconds.

[0077] -T4: The time from when RLF occurs to when UE information request is received (timeSinceFailure). If UE receives UE information request from base station later, requiring UE to report RLF to base station, then UE records the time from when RLF occurs to when UE information request is received (timeSinceFailure). This time records how long after RLF occurs, UE reports RLF to base station.

[0078] The report is sent to the base station.

[0079] -T5: The time from the last CHO (Conditional Handover) execution to the time from the latest conditional reconfiguration is received (timeSinceCHO-Reconfig).

[0080] -CHO candidate cell list, the list includes the unique or physical layer identifier of the cell. -T6: time window start time to the time when RLF is detected; the time window is obtained from the RRC message sent by the source base station in step 303.

[0081] -T7: the time from the end of the time window to the time when RLF is detected;

[0082] -T8: The time from when RLF is detected to when the window starts;

[0083] -T9: The time from when RLF is detected to when the window ends;

[0084] -Indication information of whether the time window has ended, or indication information of the end of the time window, indicating whether the time window has expired and closed when RLF occurs.

[0085] -Indication information of whether the time window has started, or indication information of whether the time window has started, or indication information of whether the time window has not started, indicating whether the time window has started when RLF occurs, or indicating whether the time window has started and has not expired when RLF occurs.

[0086] -Indicates that the time window ends or starts too early. If at the end of the time window,

[0087] If the quality of no candidate cell satisfies the conditional event setting in the conditional handover (CHO) execution condition, that is, the handover quality requirement is not met, the handover conditional event is not triggered, the UE cannot switch to the new service cell, cannot perform time window-based handover, and remains in the original service cell (source cell). When the quality of the original service cell has gradually deteriorated, the quality of a candidate cell has gradually improved, but because the time window has ended, the UE cannot perform event-based handover and is still in the source cell. Due to the poor signal quality of the source cell, the UE has an RLF in the source cell. The RLF that occurs at this time can be considered that the time window setting is unreasonable and is an error of too early a time window.

[0088] -Information indicating that the time window starts too late or ends too late. When the quality of the candidate cell meets the conditional event, the time window has not yet started. If the UE's operation is that when the quality of the candidate cell meets the conditional event, and the quality of the candidate cell meets the conditional event during the time period described in the time window, the UE can select the candidate cell as the new serving cell. Since the time window has not yet started, the UE cannot perform time-based switching and still remains in the original serving cell (source cell). The quality of the original serving cell has gradually deteriorated, and the UE has an RLF in the source cell. This RLF may occur before the start of the time window, during the duration of the time window, or after the end of the time window. In short, this situation is caused by unreasonable time window settings and the time window being started too late, which is an error of the time window being too late.

[0089] - Identification of a suitable cell. The suitable cell identification information or the reconnected cell identification information includes a global cell identification and / or a tracking area code (TAC) of the cell. The suitable cell or the reconnected cell is a cell suitable for UE access after failure or a cell to which UE successfully reconnects.

[0090] Step 305, the UE is connected to base station 2. The UE sends an RRC connection request or an RRC connection re-establishment request message to base station 2. Base station 2 sends an RRC connection establishment or an RRC connection re-establishment message to the UE. The UE sends an RRC connection establishment completion or an RRC connection re-establishment completion message to base station 2.

[0091] The cell in which the reconnection is successful includes a cell in which the UE successfully completes the RRC re-establishment process or a cell in which the UE successfully completes the RRC connection establishment process.

[0092] The RRC connection establishment complete or RRC connection re-establishment complete message includes RLF available information. If there is information of radio connection failure or handover failure in the RLF report variable and the registered PLMN is included in the PLMN identifier list of the retained RLF report variable, the RRC connection establishment complete or RRC connection re-establishment complete message includes RLF available information.

[0093] Step 306: Base station 2 sends a UE information request message to the UE. After receiving the RLF available information, base station 2 sends the UE information request message to the UE.

[0094] Step 307: The UE sends a UE information request response message to base station 2. The UE information request response message includes a RLF report. The RLF report includes at least one of the following information:

[0095] - The identity of the cell where the RLF occurs. The cell identity may be a cell unique identity CGI, or a cell physical layer identity PCI, or other identities.

[0096] -UE measurement results, including the measurement results of the serving cell, source cell, destination cell, and neighboring cell. The measurement results include the cell identifier and the measured value of the air interface quality of the cell. The cell identifier can be the cell unique identifier CGI, or the cell physical layer identifier PCI, or other identifiers. The measurement value can be the RSRP (Reference Signal Receiving Power) and RSRQ (Reference Signal Receiving Quality) of the cell.

[0097] - Re-establish the cell identifier. The cell identifier may be a cell unique identifier CGI, or a cell physical layer identifier PCI, or other identifiers.

[0098] -T1: Time from RLF time to RRC establishment completion (timeUntilReconnection-r16) -T1: Time from HO execution to detection of RLF (timeConnFailure).

[0099] -T3: The time from the last DAPS handover to the source cell detecting RLF,

[0100] (timeConnSourceDAPS-Failure)(T304 is running). The value is in milliseconds.

[0101] -T4: The time from when RLF occurs to when the UE information request is received (timeSinceFailure);

[0102] -T5: The time from the last CHO execution to the time when the latest conditional reconfiguration is received (timeSinceCHO-Reconfig).

[0103] -CHO candidate cell list, the list includes the unique or physical layer identifier of the cell. -T6: time window start time to the time when RLF is detected; the time window is obtained from the RRC message sent by the source base station in step 303.

[0104] -T7: the time from the end of the time window to the time when RLF is detected;

[0105] -T8: The time from when RLF is detected to when the window starts;

[0106] -T9: The time from when RLF is detected to when the window ends;

[0107] -Indication information of whether the time window has ended, or indication information of the end of the time window, indicating whether the time window has expired and closed when RLF occurs.

[0108] -Indication information of whether the time window has started, or indication information of whether the time window has started, or indication information of whether the time window has not started, indicating whether the time window has started when RLF occurs, or indicating whether the time window has started and has not expired when RLF occurs.

[0109] -Indicates that the time window ends or starts too early. If at the end of the time window,

[0110] If the quality of no candidate cell satisfies the conditional event setting in the conditional handover (CHO) execution condition, that is, the handover quality requirement is not met, the handover conditional event is not triggered, the UE cannot switch to the new service cell, cannot perform time window-based handover, and remains in the original service cell (source cell). The quality of the original service cell has gradually deteriorated, and the quality of a candidate cell has gradually improved, but because the time window has ended, the UE cannot perform event-based handover and is still in the source cell. Due to the poor signal quality of the source cell, the UE has an RLF in the source cell. The RLF that occurs at this time can be considered that the time window setting is unreasonable and is an error of too early a time window.

[0111] -Information indicating that the time window starts too late or ends too late. When the quality of the candidate cell meets the conditional event, the time window has not yet started. If the UE's operation is that when the quality of the candidate cell meets the conditional event, and the quality of the candidate cell meets the conditional event during the time period described in the time window, the UE can select the candidate cell as the new serving cell. Since the time window has not yet started, the UE cannot perform time-based switching and still remains in the original serving cell (source cell). The quality of the original serving cell has gradually deteriorated, and the UE has an RLF in the source cell. This RLF may occur before the start of the time window, during the duration of the time window, or after the end of the time window. In short, this situation is caused by unreasonable time window settings and the time window being started too late, which is an error of the time window being too late.

[0112] - Identification of a suitable cell. The suitable cell identification information or the reconnected cell identification information includes a global cell identification and / or a tracking area code (TAC) of the cell. The suitable cell or the reconnected cell is a cell suitable for UE access after failure or a cell to which UE successfully reconnects.

[0113] Step 308, base station 2 sends the received RLF report to the base station where the cell where the failure occurs is located. Here, the base station where the cell where the failure occurs is the source base station. Base station 2 may be a base station supporting the same wireless access technology as the source base station or a base station supporting a different wireless access technology. Base station 2 may be a base station in the same system as the source base station or a base station in a different access system.

[0114] Base station 2 sends the RLF report received from the UE to the source base station through the inter-base station interface, or sends the RLF report received from the UE to the source base station through the core network.

[0115] If base station 2 and the source base station are base stations under the same access system, for example, both are base stations under the NR system, base station 2 can send an RLF report to the source base station through an RLF indication message of the base station-to-base station interface. Base station 2 can also send an RLF report to the source base station through other base station-to-base station interface messages.

[0116] If there is no interface between base station 2 and the source base station or base station 2 and the source base station are base stations of different systems, base station 2 sends an RLF report to the source base station through the core network.

[0117] The reason why the source base station failed to detect. According to T6 (the time window start time to the time when RLF is detected) included in the RLF report, combined with the time window duration saved by the source base station, the source base station knows that the time window has expired and closed when the RLF occurs. At this time, the UE does not meet the conditions for conditional switching and cannot switch to the candidate target cell. From the measurement results included in the RLF report, the source base station can know that the quality of the candidate cell is already very good, and the quality of the serving cell is getting worse, but the UE did not perform conditional switching. The source base station knows that one reason is that the events in the configured conditional switching are unreasonable, which makes the UE initiate the switching event too late, the configured time window is too early, or the duration is too short. It is because the time window configuration is unreasonable that the UE cannot perform conditional switching.

[0118] According to T7 (the time from the end of the time window to the time when RLF is detected) included in the RLF report, the source base station knows that the time window is closed before the RLF, and the quality of the candidate cell is not good enough. Then the source base station knows that the configured time window is too early or too short.

[0119] According to T8 (the time from when the RLF is detected to when the window starts) included in the RLF report, the source base station knows that the time window starts after the RLF. Although the quality of the candidate cell is good, the time window has not started and the switching conditions are not met, the source base station knows that the configured time window is too late or too late.

[0120] According to T9 (the time from when the RLF is detected to when the window ends) included in the RLF report, combined with the time window duration saved by the source base station, the source base station knows that the time window starts after the RLF. Although the quality of the candidate cell is good, the time window has not started and the switching conditions are not met, the source base station knows that the configured time window is too late, or too late.

[0121] According to the indication information of the end of the time window contained in the RLF report, combined with the indication that the cell identity of the RLF occurred is the source cell, and referring to the measurement report to see whether the signal quality of the candidate cell is good enough, the source base station knows that the time window was closed when the time window was in RLF, and the quality of the candidate cell has not yet been good enough. In this case, the source base station knows that the configured time window is too early or too short.

[0122] According to the indication information that the time window has not started contained in the RLF report, combined with the indication that the cell identity of the RLF occurred is the source cell, and reference can also be made to the measurement report to determine whether the signal quality of the candidate cell is good enough. The source base station knows that when the time window is in RLF, the time window has not started. Although the quality of the candidate cell is good enough, the switching conditions are not met. The source base station then knows that the configured time window is too late, or too late.

[0123] According to the judgment, the source base station can adjust the setting of the time window. When configuring the handover based on the time window later, the new time window can be used and configured to the UE to improve the success rate of the UE handover.

[0124] According to the information of premature end or premature start contained in the RLF report, or according to the information of late start or late end of the time window contained in the RLF report, the source base station can adjust the setting of the time window. When configuring the time-based handover later, the new time window can be used and configured to the UE to improve the success rate of the UE handover.

[0125] At this point, the method supporting self-configuration and self-optimization of the present invention is completed. Through this method, in the case of a switching failure based on a time window, the cause of the failure can be correctly identified to perform reasonable optimization. By adjusting the time window setting, the occurrence of switching failures can be reduced, business continuity can be guaranteed, and the operator's labor costs can be reduced.

[0126] In addition, for the above-mentioned problem, that is, candidate cells reserve resources based on time windows, if the time window is set unreasonably, resource reservation for candidate cells will also cause problems. Specifically, when the source cell configures CHO, the UE is configured with CHO switching based on the time window. For conditional switching based on the time window, the CHO execution condition includes the setting of the time window and the setting of the conditional event. When the quality of the candidate cell gradually improves and the quality of the source service cell gradually deteriorates, there are two operations on the UE side. Which operation to use depends on the implementation:

[0127] Action 1: Allow the UE to switch to the candidate cell when the quality of the candidate cell meets the condition.

[0128] Action 2: Only when the quality of the candidate cell meets the condition event and the quality of the candidate cell meets the condition event within the time period described in the time window, can the candidate cell be switched to.

[0129] When the source cell configures the time window-based CHO, it also configures the time window to the base station where the candidate cell is located. The candidate cell reserves resources according to the time window. If the time window is set too late, it means that the resources are reserved after the start of the time window. Before the start of the time window, the candidate cell has not reserved resources for the UE. The reserved resources include resources reserved for random access (RACH) and resources reserved for radio bearers, which include signaling radio bearers and data radio bearers. When the quality of the candidate cell allows the UE to meet the conditional event, it can switch to the candidate cell. When the UE decides to switch to the candidate cell, it first synchronizes with the candidate cell. After synchronization, it sends an RRC reconfiguration completion message to the candidate cell. If the time window has not started, the reserved resources have not been started, so the synchronization between the UE and the candidate cell will fail, or the synchronization is completed, the UE sends an RRC reconfiguration completion message to the candidate cell, and the candidate cell has not yet allocated resources for the signaling bearer, so the candidate cell cannot correctly parse the RRC reconfiguration completion message; if the time window is set too early, when the UE decides to switch to the candidate cell, the candidate cell has released the pre-allocated resources and the UE's context information, so the RRC reconfiguration completion cannot be received normally. The following embodiments can at least be used to solve the problem that the RRC reconfiguration completion cannot be performed correctly, but are not limited to this.

[0130] See also Figure 4 , Figure 4 4 is a flow chart of a method executed by a user equipment according to an embodiment of the present disclosure. The method may include steps 401 and 402.

[0131] Step 401: The UE determines whether the configuration of the time window is reasonable.

[0132] If the UE determines that a candidate cell meets the conditional event, but the time window has not yet started, that is, the time window is too late. At this time, the resources reserved by the candidate cell for the UE have not yet started, but at least the candidate cell has received the context information of the UE. When the candidate cell receives the handover request message sent by the source base station, the candidate cell allocates a signaling radio bearer for the UE. The signaling radio bearer is a dedicated control channel for the UE and can transmit RRC messages. Before the time window is started, the signaling radio bearer can work. The candidate cell can receive the RRC reconfiguration completion message from the UE dedicated control channel. When the UE determines that the time window has not yet started, although the candidate cell has allocated a dedicated RACH resource, the UE knows that the RACH resource has not yet started. The UE can initiate a contention-based random access process, synchronize with the candidate cell, and then send the RRC reconfiguration completion to the candidate cell. The RRC reconfiguration completion contains the conditional reconfiguration identifier. The candidate cell that receives the message finds the corresponding UE context from the conditional reconfiguration identifier, and then activates or starts the reserved resources in advance. If there are no reserved resources, the resources are allocated. Or the RRC reconfiguration completion message includes the old cell (or source cell or source serving cell) identifier and / or the UE identifier of the old cell, such as C-RNTI (Cell Radio Network Temporary Identifier). The candidate cell can find the UE context information saved in the candidate cell from the cell identifier and / or the old C-RNTI, and then activate or start the reserved resources in advance. If there are no reserved resources, the resources are allocated according to the UE context.

[0133] If the UE determines that a candidate cell satisfies the conditional event, but the time window has timed out, that is, the time window is too early, considering that the candidate cell may have released the UE's context information, the UE does not perform conditional switching. The UE performs step 402 and sends an RRC setup request message to the candidate cell to re-establish the UE's context information and channel.

[0134] Or if the UE determines that a candidate cell satisfies the conditional event, but the time window has not started, that is, the time window is too late or the time window has timed out, considering that the candidate cell may not be able to correctly receive the RRC reconfiguration completion message, or the candidate cell has released the UE's context information, the UE does not perform conditional switching, and the UE performs step 402 to send an RRC establishment request message to the candidate cell to re-establish the UE's context information and channel.

[0135] The RRC Setup request message may include the old cell (or source cell or original serving cell) identifier and / or the UE identifier of the UE in the old cell, such as C-RNTI (Cell Radio Network Temporary Identifier). After receiving the RRC Setup request, the candidate cell sends a switching success message or a UE context release request message to the old base station described by the old cell identifier. The message carries the old cell identifier and / or the old UE identifier. After receiving the message, the old base station can delete the UE context corresponding to the UE identifier.

[0136] Step 402: The UE sends an RRC reconfiguration completion message or an RRC establishment message to the base station.

[0137] Through the above method, when the time window is set too late, the RRC reconfiguration completion message can still be correctly received, or when the time window is set too early, the UE directly sends an RRC establishment message to re-establish the RRC connection, thereby speeding up the RRC establishment process, or when the time window is set too early or too late, the UE directly sends an RRC establishment message to re-establish the RRC connection, thereby speeding up the RRC establishment process.

[0138] Figure 5 is a block diagram of a network device according to an embodiment of the present disclosure.

[0139] The network nodes in the network can be used to implement the first network device, the second network device, the source base station, the candidate base station, the base station 2, etc. in the present invention. Figure 5 , the network node according to the present invention includes a transceiver 510, a controller 520 and a memory 530. The transceiver 510, the controller 520 and the memory 530 are configured to perform the operations of the method and / or embodiments of the present invention. Although the transceiver 510, the controller 520 and the memory 530 are shown as separate entities, they can be implemented as a single entity, such as a single chip. The transceiver 510, the controller 520 and the memory 530 can be electrically connected or coupled to each other. The transceiver 510 can send signals to other network nodes and receive signals from other network nodes, such as UE, MN, SN, S-SN, T-SN, other candidate T-SN or core network node. The controller 520 may include one or more processing units and may control the network node to perform operations and / or functions according to one of the above embodiments. The memory 530 may store instructions for implementing the operations and / or functions of one of the above embodiments.

[0140] Figure 6 is a block diagram of a user equipment UE according to an embodiment of the present disclosure.

[0141] refer to Figure 6 , the UE according to the present invention includes a transceiver 610, a controller 620 and a memory 630. The transceiver 610, the controller 620 and the memory 630 are configured to perform the operations of the methods and / or embodiments of the present invention. Although the transceiver 610, the controller 620 and the memory 630 are shown as separate entities, they can be implemented as a single entity, such as a single chip. The transceiver 610, the controller 620 and the memory 630 can be electrically connected or coupled to each other. The transceiver 610 can send signals to other network nodes and receive signals from other network nodes, such as UE, MN, SN, S-SN, T-SN, other candidate T-SN or core network node. The controller 620 may include one or more processing units and may control the UE to perform operations and / or functions according to one of the above embodiments. The memory 630 may store instructions for implementing the operations and / or functions of one of the above embodiments.

[0142] Those skilled in the art will appreciate that the above illustrative embodiments are described herein and are not intended to be limiting. It should be understood that any two or more of the embodiments disclosed herein may be combined in any combination. In addition, other embodiments may be utilized and other changes may be made without departing from the spirit and scope of the subject matter presented herein. It will be readily understood that the various aspects of the invention of the present disclosure as generally described herein and shown in the accompanying drawings may be arranged, replaced, combined, separated and designed in a variety of different configurations, all of which are contemplated herein.

[0143] Those skilled in the art will appreciate that the various illustrative logic boxes, modules, circuits, and steps described in the present application can be implemented as hardware, software, or a combination of the two. To clearly illustrate this interchangeability of hardware and software, various illustrative components, boxes, modules, circuits, and steps are described generally in the form of their function sets above. Whether such function sets are implemented as hardware or software depends on specific applications and the design constraints imposed on the overall system. Technicians can implement the described function sets in different ways for each specific application, but such design decisions should not be interpreted as causing a departure from the scope of the present application.

[0144] The various illustrative logic blocks, modules, and circuits described in this application may be implemented or executed with a general purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. A general purpose processor may be a microprocessor, but in an alternative, the processor may be any conventional processor, controller, microcontroller, or state machine. The processor may also be implemented as a combination of computing devices, such as a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors cooperating with a DSP core, or any other such configuration.

[0145] The method or algorithm described in the present application can be directly embodied in hardware, in a software module executed by a processor, or in a combination of the two. The software module can reside in a RAM memory, a flash memory, a ROM memory, an EPROM memory, an EEPROM memory, a register, a hard disk, a removable disk, or any other form of storage medium known in the art. An exemplary storage medium is coupled to a processor so that the processor can read and write information from / to the storage medium. In an alternative, a storage medium can be integrated into a processor. The processor and the storage medium can reside in an ASIC. The ASIC can reside in a user terminal. In an alternative, the processor and the storage medium can reside in a user terminal as discrete components.

[0146] In one or more exemplary designs, the functions may be implemented in hardware, software, firmware, or any combination thereof. If implemented in software, the functions may be stored on or transmitted as one or more instructions or codes on a computer-readable medium. Computer-readable media include both computer storage media and communication media, the latter including any media that facilitates the transfer of a computer program from one place to another. Storage media may be any available media that can be accessed by a general or special purpose computer.

[0147] The above description is merely an exemplary embodiment of the present application and is not intended to limit the protection scope of the present application. The protection scope of the present application is determined by the appended claims.

Claims

1. A method performed by a first network device, the method comprising: Receiving a first container from a second network device, wherein the first container includes a radio link failure RLF report received by the second network device from a user equipment UE, and the RLF report includes a time window related message; and Based on the time window related information in the RLF report, the setting of the time window is adjusted.

2. The method according to claim 1, wherein: The time window related message includes at least one of the following: The first time indication information is used to indicate the time from the start time of the time window to the detection of the RLF; The second time indication information is used to indicate the time from the end time of the time window to the detection of the RLF; The third time indication information is used to indicate the time from when the RLF is detected to the start time of the time window; Fourth time indication information, used to indicate the time from when the RLF is detected to the end time of the time window; The fifth indication information is used to indicate whether the time window ends when the RLF occurs; Sixth indication information, used to indicate whether the time window starts when RLF occurs; The seventh indication information is used to indicate that the time window ends or starts too early; The eighth indication information is used to indicate that the time window starts too late or ends too late.

3. The method according to claim 1, wherein: Receiving the first container from the second network device includes: A first container is received from the second network device via a core network node.

4. A method performed by a user equipment, the method comprising: generating a radio link failure RLF report, the RLF report comprising a time window related message; as well as A first message is sent to a second network device, where the first message includes the RLF report.

5. The method according to claim 4, wherein: The generating of a radio link failure RLF report comprises: Determine the time window start time to the time when RLF is detected; or Determine the time from the end of the time window to the time when the RLF is detected; or Determine the time when the RLF is detected to the time window start time; or Determine the time when the RLF is detected to the end time of the time window; or Determine whether the time window ends when RLF occurs; or / and Determine whether the time window starts when RLF occurs; or / and Determine whether the time window is too early; or / and Determine whether the time window is too late; The UE saves the determination or judgment result in the RLF report.

6. The method according to claim 4, wherein: The time window related message includes at least one of the following: The first time indication information is used to indicate the time from the start time of the time window to the detection of the RLF; The second time indication information is used to indicate the time from the end time of the time window to the detection of the RLF; The third time indication information is used to indicate the time from when the RLF is detected to the start time of the time window; Fourth time indication information, used to indicate the time from when the RLF is detected to the end time of the time window; The fifth indication information is used to indicate whether the time window ends when the RLF occurs; Sixth indication information, used to indicate whether the time window starts when RLF occurs; The seventh indication information is used to indicate that the time window ends or starts too early; The eighth indication information is used to indicate that the time window starts too late or ends too late.

7. A method performed by a user equipment, the method comprising: receiving a radio resource control (RRC) reconfiguration message from the first network device, the RRC reconfiguration message including a configuration about a time window and a conditional event; Determine whether the configuration of the time window is reasonable; Based on the configuration of the time window, a radio resource control RRC reconfiguration complete message or an RRC establishment message is sent to the candidate cell.

8. The method according to claim 7, wherein: The sending a radio resource control RRC reconfiguration completion message or an RRC establishment message to the candidate cell based on the configuration of the time window includes: Based on the configuration of the time window and conditional events, it is determined that the time window is too late; A radio resource control (RRC) reconfiguration complete message is sent to the candidate cell, wherein the RRC reconfiguration complete message includes an identifier of the UE in the source cell.

9. The method according to claim 7, wherein: The sending a radio resource control RRC reconfiguration completion message or an RRC establishment message to the candidate cell based on the configuration of the time window includes: Based on the configuration of the time window and conditional events, determine when the time window is too early or too late; Send an RRC establishment message to the candidate cell.

10. A method performed by a second network device, the method comprising: receiving a first message sent by a user equipment UE, where the first message includes the RLF report, and the RLF report includes a time window related message; as well as The RLF report is sent to the first network device.

11. The method according to claim 10, wherein: The time window related message includes at least one of the following: The first time indication information is used to indicate the time from the start time of the time window to the detection of the RLF; The second time indication information is used to indicate the time from the end time of the time window to the detection of the RLF; The third time indication information is used to indicate the time from when the RLF is detected to the start time of the time window; Fourth time indication information, used to indicate the time from when the RLF is detected to the end time of the time window; The fifth indication information is used to indicate whether the time window ends when the RLF occurs; Sixth indication information, used to indicate whether the time window starts when RLF occurs; The seventh indication information is used to indicate that the time window ends or starts too early; The eighth indication information is used to indicate that the time window starts too late or ends too late.

12. The method according to claim 10, wherein: The method further comprises: A second message is sent to the user equipment, where the second message includes information for requesting the RLF report.

13. A device, comprising: A transceiver configured to transmit and receive signals with the outside; as well as A controller configured to control the transceiver to perform the method according to any one of claims 1-3 or 4-6 or 7-9 or 10-12.

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